| Fond du Lac to Oberkirch | 4,307.99 mi (6,933.04 km) |
| Fond du Lac to Obernburg am Main | 4,293.71 mi (6,910.06 km) |
| Fond du Lac to Obernkirchen | 4,195.75 mi (6,752.41 km) |
| Fond du Lac to Oberschleissheim | 4,447.51 mi (7,157.57 km) |
| Fond du Lac to Oberstdorf | 4,435.82 mi (7,138.76 km) |
| Fond du Lac to Obertraubling | 4,438.70 mi (7,143.40 km) |
| Fond du Lac to Obertshausen | 4,273.44 mi (6,877.43 km) |
| Fond du Lac to Oberursel | 4,258.71 mi (6,853.73 km) |
| Fond du Lac to Ochsenfurt | 4,334.79 mi (6,976.17 km) |
| Fond du Lac to Ochsenhausen | 4,395.83 mi (7,074.40 km) |
| Fond du Lac to Ochtrup | 4,130.74 mi (6,647.78 km) |
| Fond du Lac to Odenthal | 4,173.41 mi (6,716.45 km) |
| Fond du Lac to Oelde | 4,178.95 mi (6,725.37 km) |
| Fond du Lac to Oelsnitz | 4,377.37 mi (7,044.69 km) |
| Fond du Lac to Oer-Erkenschwick | 4,154.58 mi (6,686.15 km) |
